北大港湿地东部多环芳烃沉积记录与来源分析

doi:10.11720/wtyht.2020.1531

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Abstract

Polycyclic aromatic hydrocarbons (PAHs) in a sediment core collected from eastern Beidagang Wetland were determined by GC/MS. The ∑PAHs concentration ranges from 18.1×10 ^-9 to 821×10^-9 in the whole sediment core. In the upper core, PAHs are mainly composed of 5~6 rings which are high molecular weight components, while in the middle and lower core PAHs are mainly composed of 2~3 rings of components. Since the 1950s, PAHs content in Beidagang Wetland has increased significantly. The peak appeared from mid 1950s to mid 1960s,earlier than that in most parts of China. PAHs content has been increasing again since the 1980s. According to composition and industrial development, the sources of PAHs in different periods were analyzed. Before the 1950s, PAHs mainly came from long-distance transportation and low-temperature combustion of wood. After 1950s, PAHs mainly came from incomplete combustion of fossil fuels around the wetland. PAHs pollution in Beidagang Wetland has been obviously affected by production activities since the 1950s, the main source of PAHs was incomplete combustion of fossil fuels, while the impact of exploitation leakage in Dagang Oilfield was not significant.

Key words： Beidagang Wetland polycyclic aromatic hydrocarbons sedimentary record source vertical distribution

Received: 28 November 2019 Published: 26 October 2020

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	Han-Yu MA
	Yue-Fang SHEN
	Yao-Dong YANG

Cite this article:

Han-Yu MA,Yue-Fang SHEN,Yao-Dong YANG. Sedimentary record and sources analysis of polycyclic aromatic hydrocarbons in eastern Beidagang Wetland[J]. Geophysical and Geochemical Exploration, 2020, 44(5): 1245-1252.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2020.1531 OR https://www.wutanyuhuatan.com/EN/Y2020/V44/I5/1245

Sampling sites for sediment core

Information of analysis conditions and quality control for PAHs

Concentations of 16 PAHs in the sediment core from eastern Beidagang Wetland

Vertical profile of PAHs in sediment core

Characteristics of PAHs composition in sediment core at different periods

Comparison of sedimentary record of PAHs across different areas

PAHs cross-correlations for the ratios of sediment core

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